code: def strictly_lower_inner_product_vec_test_data(self):
      return self.generate_vec_data()
  
imports: import math
  import geomstats.backend
  from geomstats.test.data import TestData
  from .base import VectorSpaceOpenSetTestData
  from .invariant_metric import InvariantMetricMatrixTestData
  from .lie_group import MatrixLieGroupTestData
  from .pullback_metric import PullbackDiffeoMetricTestData
  from .riemannian_metric import RiemannianMetricTestData
label_desc: Use image node_id 2 for calling the CholeskyMetricTestData obj's underlying member method code with example usage: obj.strictly_lower_inner_product_vec_test_data() and returns: self